Motherboard with a charging function

ABSTRACT

A motherboard having a charging function is provided. A connection interface is configured to an electrical device. A first controller communicates with the electrical device via a first transmission path. A second controller communicates with the electrical device via a second transmission path. In a first mode, the first controller directs a voltage converter circuit to generate first charge power to the electrical device. In a second mode, the second controller directs the voltage converter circuit to generate second charge power to the electrical device. In a third mode, the first controller determines whether the electrical device is a specific device. Responsive to the electrical device not being the specific device, the voltage converter circuit generates third charge power to the electrical device. Responsive to the electrical device being the specific device, the voltage converter circuit generates fourth charge power to the electrical device.

CROSS REFERENCE TO RELATED APPLICATIONS

This Application claims priority of Taiwan Patent Application No.107127423, filed on Aug. 7, 2018, the entirety of which is incorporatedby reference herein.

BACKGROUND OF THE INVENTION Field of the Invention

The invention relates to a motherboard, and more particularly to amotherboard having a charging function.

Description of the Related Art

With technological development, the functions and types of electronicdevices have increased. Generally, chargers (or charging lines) fordifferent electronic devices are not compatible. For example, differentelectronic devices cannot share the same charging line. Therefore, auser needs to have many chargers and charging lines. When the user goesout, it is necessary to bring many chargers and the correspondingcharging lines, thus increasing inconvenience.

BRIEF SUMMARY OF THE INVENTION

In accordance with an embodiment, a motherboard has a charging functionand comprises a connection interface, a switching circuit, a firstcontroller, a second controller, and a voltage converter circuit. Theconnection interface is configured to an electrical device. Theswitching circuit is coupled to the connection interface and comprises afirst transmission path and a second transmission path. The firstcontroller is coupled to the switching circuit and communicates with theelectrical device via the first transmission path. The second controlleris coupled to the switching circuit and communicates with the electricaldevice via the second transmission path. The voltage converter circuitis coupled to the connection interface, the first controller and thesecond controller. In a standard charge mode, the first transmissionpath is turned on and the first controller directs the voltage convertercircuit to generate first charge power to the electrical device. In afirst fast charge mode, the second transmission path is turned on andthe second controller directs the voltage converter circuit to generatesecond charge power to the electrical device. In a second fast chargemode, the first transmission path is turned on and the first controllerdetermines whether the electrical device is a specific device.Responsive to the electrical device not being the specific device, thefirst controller directs the voltage converter circuit to generate thirdcharge power to the electrical device. Responsive to the electricaldevice being the specific device, the first controller directs thevoltage converter circuit to generate fourth charge power to theelectrical device.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention can be more fully understood by referring to the followingdetailed description and examples with references made to theaccompanying drawings, wherein:

FIG. 1 is a schematic diagram of an exemplary embodiment of an operationsystem, according to various aspects of the present disclosure.

FIG. 2A is an illustration of an exemplary embodiment of a menudisplayed on a monitor according to various aspects of the presentdisclosure.

FIG. 2B is an operation chart of an exemplary embodiment of FIG. 2Aaccording to various aspects of the present disclosure.

FIG. 3A is an illustration of another exemplary embodiment of a menudisplayed on a monitor according to various aspects of the presentdisclosure.

FIG. 3B is an operation chart of an exemplary embodiment of FIG. 3Aaccording to various aspects of the present disclosure.

FIG. 4 is a schematic diagram of an exemplary embodiment of a chargecircuit, according to various aspects of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be described with respect to particularembodiments and with reference to certain drawings, but the invention isnot limited thereto and is only limited by the claims. The drawingsdescribed are only schematic and are non-limiting. In the drawings, thesize of some of the elements may be exaggerated for illustrativepurposes and not drawn to scale. The dimensions and the relativedimensions do not correspond to actual dimensions in the practice of theinvention.

FIG. 1 is a schematic diagram of an exemplary embodiment of an operationsystem, according to various aspects of the present disclosure. Theoperation system 100 comprises an electrical device 110, a motherboard120 and a monitor 130. In this embodiment, when the electrical device110 is coupled to the motherboard 120, the motherboard 120 outputs animage signal SI. The monitor 130 displays a charge menu according to theimage signal SI for user to choose. When a user chooses a chargingoption on the charge menu, the motherboard 120 outputs a correspondingcharge power to charge the electrical device 110. The kind of electricaldevice 110 is not limited in the present disclosure. In one embodiment,the electrical device 110 is a mobile electrical device, such as a smartphone or a flat plate.

The motherboard 120 at least comprises a charge circuit 121, a centralprocessing unit (CPU) 122, a memory 123, an image processing circuit 124and a connection interface 125. In one embodiment, when the electricaldevice 110 is coupled to the connection interface 125, the chargecircuit 121 notifies the CPU 122. The CPU 122 performs a charge programcode stored in the memory 123 to generate a control signal SC. The imageprocessing circuit 124 generates an image signal SI according to thecontrol signal SC. The monitor 130 displays a charge menu according tothe image signal SI.

The charge menu displayed on the monitor 130 includes many chargingoptions. A user chooses the appropriate charging option according to thebrand of the electrical device 110. The CPU 122 directs the chargecircuit 121 to output appropriate charge power according to the chosencharging option. Since the charge circuit 121 supports many chargeprotocols, the user only utilizes a connection line coupled between theelectrical device 110 and the motherboard 120 to fast charge theelectrical device 110. Therefore, the user does not need to buyadditional specific charger.

Furthermore, even if the motherboard 120 operates in a power savingmode, such as a S3 mode (suspend to RAM) or a S4 mode (suspend to Disk)defined by an advanced configuration and power interface (ACPI)specification, the charge circuit 121 is capable of charging theelectrical device 110 continually. Additionally, with the charge menudisplayed on the monitor 130, the user is capable of choosing anappropriate charging option. The user is also capable of controlling thecharge time to avoid overcharging the battery disposed in the electronicdevice. The charge menus displayed on the monitor 130 will be describedin greater detail with reference FIGS. 2A and 3A.

The invention does not limit the number of charge circuits or the numberof connection interfaces. In other embodiments, the motherboard 120further comprises a connection interface 126 and a charge circuit 127.When the electrical device 140 is coupled to the connection interface126, the monitor 130 displays a charge menu including various chargingoptions to be chosen by a user. The charge circuit 127 outputs chargepower to the electrical device 140 according to the chosen chargingoption. In one embodiment, the charge power output from the chargecircuit 121 may be the same as or different from the charge power outputfrom the charge circuit 127.

The invention does not limit the kind of monitor 130. In one embodiment,the monitor 130 may be a touch screen. In this case, a user is capableof utilizing his finger to choose the charge options displayed on themonitor 130. In other embodiments, the user may utilize other inputdevice (e.g. a keyboard or a mouse) to indirectly choose the chargingoption displayed on the monitor 130.

In one embodiment, the motherboard 120 and the monitor 130 areintegrated into a single electrical device, such as a laptop computer.In other embodiments, the motherboard 120 is disposed in a case andconnected to the monitor 130 via a transmission line. The kind oftransmission line is not limited in the present disclosure. In oneembodiment, the transmission line between the motherboard 120 and themonitor 130 is a video graphics array (VGA) transmission line, a digitalvisual interface (DVI) transmission line, or a high definitionmultimedia interface (HDMI) transmission line.

FIG. 2A is an illustration of an exemplary embodiment of a charge menudisplayed on the monitor 130 according to various aspects of the presentdisclosure. As shown in FIG. 2A, the charge menu 210 has a standardcharging option 211, a first fast charging option 212 and a second fastcharging option 213. FIG. 2B is an operation chart of an exemplaryembodiment of FIG. 2A according to various aspects of the presentdisclosure. When the standard charging option 211 is chosen by the user,a controller (e.g. the CPU 122) of the motherboard 120 directs thecharge circuit 121 to provide first charge power to the electricaldevice 110. In this embodiment, the first charge power meets the USBimplementers forum (USB-IF) specification. For example, the power of thefirst charge power may be about 2.5 W. At this time, all elements of themotherboard 120 operate in a normal mode, such as the S0 mode defined inthe ACPI specification.

However, when a specific element (e.g., the CPU 122) disposed on themotherboard 120 exits a normal mode and enters a power saving mode(e.g., the S3 mode or the S4 mode defined in the ACPI specification),the charge circuit 121 may or may not adjust the first charge power. Inone embodiment, the charge circuit 121 may maintain or reduce the firstcharge power or stop providing the first charge power. In anotherembodiment, the charge circuit 121 may output a wake-up signal accordingto a signal generated by the electronic device 110. Any elementoperating in the power saving mode is woken up according to the wake-upsignal. In other embodiments, the charge circuit 121 does not output anywake-up signal. Therefore, the electronic device 110 cannot utilize thecharge circuit 121 to wake the specific element entering the powersaving mode.

When the user chooses the first fast charging option 212, themotherboard 120 directs the charge circuit 121 to provide second chargepower to the electronic device 110. In one embodiment, the chargecircuit 121 provides the second charge power according to a quick charge(QC) 2.0 protocol or a QC 3.0 protocol. Take the QC 3.0 as an example,when the electronic device 110 receives the second charge power, thestate of charge (SOC) of the battery in the electronic device 110 isincreased from 0% to 80% after 35 minutes. In this embodiment, thesecond charge power is higher than the first charge power. For example,the power of the second charge power is about 18 W. At this time, themotherboard 120 operates in a normal mode. In some embodiments, when aspecific element of the motherboard 120 enters a power saving mode, thecharge circuit 121 may reduce the second charge power (e.g., from 18 Wto 5 W). In other embodiments, when the user chooses the first fastcharging option 212, the electronic device 110 cannot utilize the chargecircuit 121 to wake the specific element operating in the power savingmode.

When the user chooses the second fast charging option 213, the chargecircuit 121 determines whether the electronic device 110 is a specificdevice, such as an iPhone 8, an iPhone X or an iPad Pro produced byApple Inc. When the electronic device 110 is not an iPhone 8, an iPhoneX or an iPad Pro, the charge circuit 121 provides third charge power tothe electronic device 110. When the electronic device 110 is an iPhone8, an iPhone X or an iPad Pro, the charge circuit 121 provides fourthcharge power to the electronic device 110. In one embodiment, the fourthcharge power is greater than the third charge power. For example, thethird charge power is about 12 W and the fourth charge power is about 15W. In some embodiments, when the electronic device 110 receives thethird or fourth charge power, the SOC of the battery in the electronicdevice 110 reaches 50%.

In other embodiments, when a specific element of the motherboard 120operates in a power saving mode, the charge circuit 121 provides fifthcharge power to the electronic device 110. In this embodiment, the fifthcharge power is less than the third charge power and the fourth chargepower. In one embodiment, the fifth charge power is approximately 5 W.At this time, the electronic device 110 cannot utilize the chargecircuit 121 to wake the specific element operating in the power savingmode.

In other embodiments, the charge menu 210 further comprises a timesetting option 214 shown in FIG. 2A. When the user chooses the timesetting option 214 and inputs charging time, the charge circuit 121provides charge power to the electronic device 110 according to thecharging time. For example, assume that the charging time provided byuser is one hour. In this case, when the duration of the charge circuit121 providing the charge power reaches one hour, the charge circuit 121stops providing the charge power to avoid overcharging the batterydisposed in the electronic device 110.

In one embodiment, the user may choose one of the standard chargingoption 211, the first fast charging option 212 and the second fastcharging option 213 and then choose the time setting option 214 to limitthe duration of the charge time. In another embodiment, the user maychoose the timing setting option 214 and then choose one of the standardcharging option 211, the first fast charging option 212 and the secondfast charging option 213. In another embodiment, the user may onlychoose one of the standard charging option 211, the first fast chargingoption 212 and the second fast charging option 213 and may not choosethe time setting option 214.

In other embodiments, the motherboard 120 may comprise a plurality ofconnection interfaces and a plurality of charge circuits. In this case,each connection interface is coupled to a charge circuit. Each time anelectronic device is coupled to a connection interface, the monitor 130displays a corresponding charge menu. For example, when a firstelectronic device is coupled to a first connection interface, themonitor 130 displays a first charge menu so that the user can choose theappropriate charging option for the first electronic device. When asecond electronic device inserts a second connection interface, themonitor 130 displays a second charge menu so that the user can choosethe appropriate charging option for the second electronic device. Thefirst charge menu may be the same as or different from the second chargemenu. In one embodiment, the user may select a first fast chargingoption of the first charge menu and select a second first fast chargingoption of the second charge menu. Therefore, the charge power providedto the first electronic device is different from the charge powerprovided to the second electronic device.

FIG. 3A is an illustration of another exemplary embodiment of a menudisplayed on a monitor according to various aspects of the presentdisclosure. The charge menu 310 comprises a standard charging option 311and a fast charging option 312. FIG. 3B is an operation chart of anexemplary embodiment of FIG. 3A according to various aspects of thepresent disclosure. When the user selects the standard charging option311, the charge circuit 121 provides first charge power to theelectronic device 110. At this time, when a specific element of themotherboard 120 enters a power saving mode, the charge circuit 121 maymaintain or reduce the first charge power. In other embodiments, thecharge circuit 121 may stop providing the first charge power. In oneembodiment, the charge circuit 121 generates a wake-up signal accordingto at least one signal generated by the electronic device 110 to wakethe specific element operating in the power saving mode. In anotherembodiment, the charge circuit 121 does not generate the wake-up signal.

When the user selects the fast charging option 312, the charge circuit121 determines whether the electronic device 110 is a product of AppleInc. In one embodiment, the charge circuit 121 determines whether theelectronic device 110 is a product of Apple Inc. according to theoperating system of the electronic device 110. For example, when theelectronic device 110 does not have an IOS operating system, it meansthat the electronic device 110 is not one produced by Apple Inc.Therefore, the charge circuit 121 provides a second charge power to theelectronic device 110. The second charge power is greater than the firstcharge power. At this time, when a specific element of the motherboard120 enters a power saving mode, the charge circuit 121 may reduce thesecond charge power. At this time, the charge circuit 121 does notgenerate the wake-up signal.

When the electronic device 110 has the IOS operating system, it meansthat the electronic device 110 is produced by Apple Inc. Therefore, thecharge circuit 121 determines whether the electronic device 110 is aspecific device, such as an iPhone 8, an iPhone X or an iPad Pro. Whenthe electronic device 110 is not the specific device, the charge circuit121 provides third charge power to the electronic device 110. When theelectronic device 110 is the specific device, the charge circuit 121provides fourth charge power to the electronic device 110.

At this time, when a specific element (e.g., the element 122, 123 or 124shown in FIG. 1) of the motherboard 120 enters a power saving mode, thecharge circuit 121 may provide fifth charge power to the electronicdevice 110. The fifth charge power is greater than the first chargepower but less than each of the third charge power and the fourth chargepower. In one embodiment, when the charge circuit 121 provides the fifthcharge power to the electronic device 110, the charge circuit 121 doesnot generate a wake-up signal.

In other embodiments, the charge circuit 121 determines whether theelectronic device 110 is produced by Apple Inc. according to the vendorID of the electronic device 110. In one embodiment, the vendor ID has aplurality of bits. The charge circuit 121 determines whether theelectronic device 110 is a product produced by Apple Inc. according toat least one bit of the vendor ID. In this case, the charge circuit 121determines that the type (e.g., the iPhone 8, the iPhone X or the iPadPro) of the electronic device 110 according to one or more bits of thevendor ID.

In other embodiments, the charge menu 310 further has a time settingoption 313 to limit the charging time of the electronic device 110.Since the feature of the time setting option 313 is the same as thefeature of the time setting option 214 of FIG. 2A, the description ofthe feature of the time setting option 313 is omitted.

FIG. 4 is a schematic diagram of an exemplary embodiment of a chargecircuit, according to various aspects of the present disclosure. Asshown in FIG. 4, the charge circuit 121 comprises a voltage convertercircuit 410, a switching circuit 420 and controllers 430 and 440. Inthis embodiment, the charge circuit 121 communicates with the electronicdevice 110 via the connection interface 125 and outputs the appropriatecharge power according to the charging option chosen by the user.

The kind of connection interface 125 is not limited in the presentdisclosure. In one embodiment, the connection interface 125 is a USB 2.0connection port or a USB 3.1 connection port. In this embodiment, theconnection interface 125 has pins Vout, D+, D− and GND. The pins Voutand GND are configured to transmit charge power to the electronic device110. The pins D+ and D− are configured to transmit data. In oneembodiment, the charge circuit 121 communicates with the electronicdevice 110 via the pins D+ and D−.

The voltage converter circuit 410 is coupled to the connection interface125 to output the charge power PO. The voltage converter circuit 410 isfurther coupled to the controllers 430 and 440 to receive triggersignals ST1 and ST2. In this embodiment, the voltage converter circuit410 converts input power PI to generate the charge power PO according tothe trigger signal ST1 or ST2. In one embodiment, the voltage convertercircuit 410 converts the voltage level or the current of the input powerPI to generate a converted result and serves the converted result as thecharge power PO. In other embodiments, the input power PI is provided bya power supply (not shown). In some embodiments, the voltage convertercircuit 410 stops outputting the charge power PO according to a disablesignal STP.

The switching circuit 420 is coupled to the connection interface 125 andtransmits the signals on the pins D+ and D− to the controller 430 or 440according to switching signals SSW1 and SSW2. In this embodiment, whenthe switching circuit 420 transmits the signals on the pins D+ and D− tothe controller 430, the switching circuit 420 does not transmit thesignals on the pins D+ and D− to the controller 440. When the switchingcircuit 420 transmits the signals on the pins D+ and D− to thecontroller 440, the switching circuit 420 does not transmit the signalson the pins D+ and D− to the controller 430.

The disclosure does not limit the circuit structure of switching circuit420. In one embodiment, the switching circuit 420 comprises switches 421and 422. The switch 421 turns the transmission path PA1 on and offaccording to the switching signal SSW1. The transmission path PA1 iscoupled between the pins D+ and D− of the connection interface 125 andthe controller 440. The switch 422 turns the transmission path PA2 onand off according to the switching signal SSW2. The transmission pathPA2 is coupled between the pins D+ and D− of the connection interface125 and the controller 430.

The controller 430 is coupled between the switching circuit 420 and thevoltage converter circuit 410. In this embodiment, the controller 430communicates with the electronic device 110 via the transmission pathPA2 and generates the trigger signal ST2 according to the chargingrequirements of the electronic device 110. The disclosure does not limitthe circuit structure of controller 430. In one embodiment, thecontroller 430 is an identification charging integrated circuit (IC). Inother embodiments, the controller 430 does not supply a wake-upfunction. Therefore, the controller 430 cannot generate a wake-up signalaccording to the signal generated by the electronic device 110.

The controller 440 is coupled between the switching circuit 420 and thevoltage converter circuit 410. In this embodiment, the controller 440communicates with the electronic device 110 via the transmission pathPA1 and generates the trigger signal ST1 according to the chargingrequirements of the electronic device 110. The disclosure does not limitthe circuit structure of controller 440. In one embodiment, thecontroller 440 is a platform controller hub (PCH). In anotherembodiment, the controller 440 supplies a wake-up function. In thiscase, the controller 440 can generate a wake-up signal according to thesignal generated by the electronic device 110 to wake the specificelements of the motherboard 120 operating a power saving mode. In otherembodiments, the controller 440 does not supply a wake-up function.

In some embodiments, the controller 440 may communicate with someelements of the motherboard 120 via at least one transmission line 441.In one embodiment, the controller 440 identifies the charging optionselected by the user according to the signal of the transmission line441 and generates the corresponding switching signals SSW1 and SSW2according to the selected charging option. In another embodiment, theswitching signals SSW1 and SSW2 are provided by other element (e.g., aCPU) of the motherboard 120.

When the user chooses the standard charging option 211 of FIG. 2A or thestandard charging option 311 of FIG. 3A, the charge circuit 121 enters astandard charge mode. In this mode, the controller 440 turns on thetransmission path PA1 and turns off the transmission path PA2 accordingto the switching signals SSW1 and SSW2. In one embodiment, thecontroller 440 does not communicate with the electronic device 110. Inthis case, the controller 440 directly controls the voltage convertercircuit 410 to generate charge power PO. At this time, the charge powerPO is referred to as first charge power. In this mode, even if theoperating system of the electronic device 110 is the IOS system or theAndroid system, the charge circuit 121 provides the first charge powerto charge the electronic device 110.

Furthermore, in the standard charge mode, when the controller 440determines that the specific element of the motherboard 120 enters apower saving mode, the controller 440 sends the trigger signal to directthe voltage converter circuit 410 to maintain or reduce the charge powerPO. In other embodiments, the voltage converter circuit 410 may stopproviding the charge power PO. In some embodiments, when the controller440 supplies a wake-up function, the electronic device 110 is capable ofwaking the specific element of the motherboard 120 via the controller440.

When the user chooses the first fast charging option 212 of FIG. 2A, thecharge circuit 121 enters a first fast charge mode. In this mode, thecontroller 440 turns off the transmission path PA1 and turns on thetransmission path PA2. Therefore, the controller 430 communicates withthe electronic device 110 via the transmission path PA2 to identify thecharge power required by the electronic device 110. Then, the controller430 generates the trigger signal ST2 to direct the voltage convertercircuit 410 to generate the charge power PO. At this time, the chargepower PO is referred to as second charge power. In this case, when thecontroller 430 determines that a specific element of the motherboard 120enters a power saving mode, the controller 430 sends the trigger signalST2 to direct the voltage converter circuit 410 to reduce the chargepower PO. In one embodiment, the power of the charge power PO is reducedfrom 18 W to 5 W.

The disclosure does not limit how the controller 430 determines whetherthe specific element of the motherboard 120 enters the power savingmode. In one embodiment, the controller 430 is coupled to themotherboard 120 via at least one transmission line (not shown) todetermine that the specific element of the motherboard 120 has enteredthe power saving mode. In other embodiments, the controller 430 receivesan advice signal from the controller 440 to determine that the specificelement of the motherboard 120 enters the power saving mode.

When the user chooses the second fast charging option 213, the chargecircuit 121 enters a second fast charge mode. In this mode, thecontroller 440 turns on the transmission path PA1 and turns off thetransmission path PA2. At this time, the controller 440 communicateswith the electronic device 110 via the transmission path PA1 todetermine whether the electronic device 110 is a specific device.

When the electronic device 110 is not the specific device, thecontroller 440 sends the trigger signal ST1 to direct the voltageconverter circuit 410 to generate the charge power PO. At this time, thecharge power PO is referred to as third charge power. When theelectronic device 110 is the specific device, the controller 440 directsthe voltage converter circuit 410 to generate the charge power PO. Atthis time, the charge power PO is referred to as fourth charge power.

In the second fast charge mode, when the controller 440 determines thata specific element of the motherboard 120 enters a power saving mode,the controller 440 turns off the transmission path PA1 and turns on thetransmission path PA2. At this time, the controller 430 may utilize thetransmission path PA2 to inform the electronic device 110 that thecharge power will be reduced. Then, the controller 430 sends the triggersignal ST2 to directly the voltage converter circuit 410 to reduce thecharge power PO. At this time, the charge power PO is referred to asfifth charge power.

In one embodiment, the fifth charge power is less than each of the thirdcharge power and the fourth charge power. For example, when theelectronic device 110 is the specific device, the power of the chargepower PO may reduce from 15 W to 5 W. When the electronic device 110 isnot the specific device, the power of the charge power PO may reducefrom 12 W to 5 W. In other embodiments, the fifth charge power isgreater than the first charge power. When the controller 430 does notsupply the wake-up function, the electronic device 110 cannot utilizethe charge circuit 121 to wake the specific element entering the powersaving mode. In one embodiment, the user needs to press a power switchto wake the specific element entering the power saving mode. In thiscase, when the specific element is waked, the controller 440 turns onthe transmission path PA1 and turns off the transmission path PA2 todetermine whether the electronic device 110 is a specific device anddirects the voltage converter circuit 410 to again output the third orfourth charge power according to the determination result.

In other embodiments, when the user selects the fast charging option 312of FIG. 3B, the controller 440 turns on the transmission path PA1 todetermine whether the electronic device 110 was produced by Apple Inc.When the electronic device 110 is not one produced by Apple Inc., thecharge circuit 121 enters a first fast charge mode. In the first fastcharge mode, the charge circuit 121 outputs the second charge power.When the electronic device 110 is one produced by Apple Inc., the chargecircuit 121 enters a second fast charge mode. In the second fast chargemode, the charge circuit 121 outputs the third or fourth charge power.Since the operation of the charge circuit 121 in the first or secondfast charge mode has been described previously, the description of thecharge circuit 121 in the first or second fast charge mode is omitted.

In another embodiment, the charge circuit 121 further comprises acounter 450. The counter 450 has a count value. When the user selectsthe time setting option 214 of FIG. 2B or the time setting option 313 ofFIG. 3B, the counter 450 starts to increase or reduce the count value.When the count value is equal to a predetermined value, the counter 450generates a disable signal STP. The voltage converter circuit 410 stopsproviding any power to the electronic device 110 according to thedisable signal STP. In one embodiment, the predetermined value isrelated to the charging time input by the user.

Since the charge circuit 121 supplies many charge protocol, the useronly utilizes a connection line to connect the electronic device 110 tothe motherboard 120 to charge the electronic device 110. The user doesnot need to buy an additional charger. Additionally, when the chargecircuit 121 provides power to the electronic device 110 according to theQC 3.0 protocol, the SOC of the battery in the motherboard 120 isincreased from 0% to 80% after 35 minutes. Furthermore, the chargecircuit 121 is capable of fast increasing the SOC of the battery in themotherboard 120 to 50% within 30 minutes. In addition, even if themotherboard 120 operates in a power saving mode (e.g., S3 or S4), thecharge circuit 121 is capable of continually charging the electronicdevice 110. Additionally, with the charge menu 210 or 310 displayed onthe monitor 130, the user can select the appropriate charging optionaccording to his own needs. Since the charge menu 210 or 310 provides atime setting option to allow the user to control the charging time.Therefore, the disclosure provides double protection for the powermanagement device (e.g., the charge circuit).

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art andwill not be interpreted in an idealized or overly formal sense unlessexpressly so defined herein.

While the invention has been described by way of example and in terms ofthe preferred embodiments, it should be understood that the invention isnot limited to the disclosed embodiments. On the contrary, it isintended to cover various modifications and similar arrangements (aswould be apparent to those skilled in the art). For example, it shouldbe understood that the system, device and method may be realized insoftware, hardware, firmware, or any combination thereof. Therefore, thescope of the appended claims should be accorded the broadestinterpretation so as to encompass all such modifications and similararrangements.

What is claimed is:
 1. A motherboard having a charging function andcomprising: a connection interface configured to an electrical device; aswitching circuit coupled to the connection interface and comprising afirst transmission path and a second transmission path; a firstcontroller coupled to the switching circuit and communicating with theelectrical device via the first transmission path; a second controllercoupled to the switching circuit and communicating with the electricaldevice via the second transmission path; a voltage converter circuitcoupled to the connection interface, the first controller and the secondcontroller, wherein in a standard charge mode, the first transmissionpath is turned on and the first controller directs the voltage convertercircuit to generate first charge power to the electrical device; whereinin a first fast charge mode, the second transmission path is turned onand the second controller directs the voltage converter circuit togenerate second charge power to the electrical device; wherein in asecond fast charge mode, the first transmission path is turned on andthe first controller determines whether the electrical device is aspecific device, responsive to the electrical device not being thespecific device, the first controller directs the voltage convertercircuit to generate third charge power to the electrical device, andresponsive to the electrical device being the specific device, the firstcontroller directs the voltage converter circuit to generate fourthcharge power to the electrical device.
 2. The motherboard as claimed inclaim 1, wherein the second charge power exceeds each of the firstcharge power, the third charge power and the fourth charge power, andthe fourth charge power exceeds the third charge power.
 3. Themotherboard as claimed in claim 1, further comprising: an imageprocessing circuit configured to generate an image signal to a monitor,wherein the monitor displays a menu according to the image signal,wherein responsive to a first option in the menu being chosen, the firsttransmission path is turned on and the voltage converter circuitgenerates the first charge power to the electrical device, whereinresponsive to a second option in the menu being chosen, the secondtransmission path is turned on and the voltage converter circuitgenerates the second charge power to the electrical device, whereinresponsive to a third option in the menu being chosen, the firsttransmission path is turned on and the voltage converter circuitgenerates the third or fourth charge power to the electrical device. 4.The motherboard as claimed in claim 3, further comprising: a counterhaving a count value, wherein responsive to the count value being equalto a predetermined value, the voltage converter circuit stops generatingany charge power to the electrical device.
 5. The motherboard as claimedin claim 4, wherein responsive to a fourth option in the menu beingchosen, the counter starts counting.
 6. The motherboard as claimed inclaim 1, further comprising: a specific element, wherein in the firstfast charge mode, responsive the specific element entering a powersaving mode, the second controller directs the voltage converter circuitto generate fifth charge power to the electrical device, wherein in thesecond fast charge mode, responsive to the specific element entering thepower saving mode, the first transmission path is turned on and thefirst controller directs the voltage converter circuit to generate thefifth charge power to the electrical device.
 7. The motherboard asclaimed in claim 6, wherein the fifth charge power is less than thethird charge power and the fourth charge power.
 8. The motherboard asclaimed in claim 7, wherein the fifth charge power exceeds the firstcharge power.
 9. The motherboard as claimed in claim 1, wherein thefirst controller is a platform controller hub (PCH), and the secondcontroller is an identification charging integrated circuit.
 10. Themotherboard as claimed in claim 1, wherein the second controller directsthe voltage converter circuit to generate the second charge poweraccording to a quick charge technology.